Q. ​For the two reactions given below : 
H 2 (g) + 1/2 O 2 (g) H 2 O ( l ) + x 1 , kJ/mol
H 2 (g) + 1/2 O 2 (g) H 2 O  (g) + x 2  kJ/mol 
Compare the magnitude of x 1 and   x 2 : ( x 1 and x 2 are the heat released in above two processes) 
  1. x 1 >   x 2
  2. x 1 <   x 2
  3. x 1 =   x 2
  4. cannot be compared

x1>x2. H2O (l) is more stable than H2O (g) . So more energy will be released.
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sergghnumikm
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x1>x2. H2O (l) is more stable than H2O (g) . So more energy will be released.
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    Some of the heat is used to vaporise the H2O(l). X1>X2
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    Some of the heat is used to vaporise the H2O (l) .'. X1>X2

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    What are you looking for?